Home/ Supplements/ L Theanine/ Caffeine 100 mg + Theanine 100 mg

Caffeine 100 mg + Theanine 100 mg

product on market Capsule PrimaForce Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · grounded in 1 source · methodology

Caffeine and L-theanine are combined to improve alertness and cognitive performance. Strong evidence suggests that L-theanine may mitigate the jittery effects of caffeine while enhancing focus. This combination is widely researched for its synergistic impact on attention and reaction time.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Caffeine 100 mg + Theanine 100 mg
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
180
Servings
Non-Nutrient/Non-Botanical
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Market median: 180.0mg (239 products) 49 studies (A:1, B:19)
100 mg
Market median: 200.0mg (358 products) 9 studies (A:0, B:2)

Other Ingredients

Rice Flour Gelatin Microcrystalline Cellulose Magnesium Stearate Silica
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested use: As a dietary supplement, take 1 capsule daily with 8-12 oz of water or as directed by your healthcare professional.

Warnings & Precautions

Do not consume more than 400 mg of caffeine from any source in a 24 hour period. Too much caffeine may cause nervousness, irritability, sleeplessness, and occasional rapid heart rates. In case of accidental overdose, seek professional assistance or contact a poison control center immediately.

Warning: For healthy individuals 18 years and older. Keep out of reach of children.

Consult a healthcare professional prior to use if you are pregnant or nursing, taking medication, or have an medical condition.

Warning: For healthy individuals 18 years and older. Do not use if safety seal is broken or missing.

Formulation Notes

Tested for purity & potency

100 mg Caffeine per serving + 100 mg L-Theanine per serving

Additional Information

Notice: Store in a cool, dry place.

Metadata

Product Details

UPC / SKU8 11445 02000 9
DSLD Entry Date2025-07-24
Product TypeNon-Nutrient/Non-Botanical
FormCapsule
DSLD ID333804
Data Updated2026-04-11
Research

Research Evidence

37
Research Sources
53
Avg Quality
22
Rct
10
Systematic Review
3
Meta Analysis
1
Clinical Trial
1
Openfda Safety
B Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials
Systematic Review Nutritional neuroscience 2026 PubMed DOI
B The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis
Meta Analysis Sleep medicine reviews 2025 PubMed DOI
B The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness
Rct Nutritional neuroscience 2010 PubMed DOI
B Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial
Rct Nutrients 2019 PubMed DOI
B The Role of Supplements and Over-the-Counter Products to Improve Sleep in Children: A Systematic Review
Systematic Review International journal of molecular sciences 2023 PubMed DOI
B Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Meta Analysis Nutrition reviews 2025 PubMed DOI
B Effect of Alpha-S1-Casein Tryptic Hydrolysate and L-Theanine on Poor Sleep Quality: A Double Blind, Randomized Placebo-Controlled Crossover Trial
Rct Nutrients 2022 PubMed DOI
B Effect of L-theanine on selective attention in a traffic-related reaction task in sleep-deprived young adults: a double-blind placebo-controlled, crossover study
Rct Nutritional neuroscience 2025 PubMed DOI
B The combined effects of L-theanine and caffeine on cognitive performance and mood
Rct Nutritional neuroscience 2008 PubMed DOI
B Acute effects of tea constituents L-theanine, caffeine, and epigallocatechin gallate on cognitive function and mood: a systematic review and meta-analysis
Meta Analysis Nutrition reviews 2014 PubMed DOI
View all evidence for L Theanine →
Compare

Similar Products

View all L Theanine products →

This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.